Lock



N. ammo.

LOCK. APPLICATION FILED DEC. TI, 1918. 1,368,727, 7 Patented FM). 15, 921.

3 SHEETS-SHEET 1- I8 I i? i 6 Mme/ma N. B. Hum.

. LOCK. APPLICATION FILED DEC. II, 1918.

Patented Feb. 15,1921.

a SHEETSSHECT 2.

. INVENTOI? MM ymx m N. B. HURD.

LOCK. APPLICKHON man 050.11. I918.

3 SHEETS-SHEET 3- Patentad Feb. 15, 1921.

barren STATES Parent or rica.

NORMAN B. HURD, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO AMERICAN HARDWARE CORPORATION, OF NEW BRITAIN, CONNECTICUT, A CORPORA- .TION OF CONNECTICUT.

weaver.

To a ZZ whom it may concern:

Be it known that I NORMAN B. HURD, a citizen of the United states of America, residing at New Britain, Connecticut, have invented a new and useful'Lock, of which the followlng is a specification.

My invention relates to door locks and particularly locks of the type in which there is a spring latch bolt provided, which latch bolt is alone so controlledthat it may likewise perform the function of a dead bolt.

My present invention is essentially an improvement on the construction set forth in my former Patent #1,168,725, dated January 18, 1916. In the present case as well as in the lock shown in my said earlier patent, a single key standing in a single keyhole at the outside of the door may be used to perform anyone of thefollowing functions p v F1rst:-It may be used as a meansto retract the latch bolt at any time.

u Second It may be used as a means to set or throw on certain stop work, whereby the outside knob or thumb-plece' may be rendered ineffective at certain times, so that the latch cannot be retracted thereby.

I Third It may be used for the purpose of operating hold back mechanism, whereby the latchbolt when in a retracted position may be locked back in that position during certain hours when it is desired to leave the door not only unlocked fbut unlatched, so that it may be freely pushed open.

The arrangementof parts in the present case is such that when said key is operated to retract the latch; there is no danger of operating thestop work mechanism, or vice functioning of said parts being wholly independent. In the lock of my former patent if the said key-is rotated in a direction to retract the latch, it will also perform the function of throwing off the stop work, so as to permit access thereafter by the mere turning of the outer knob. Inasmuch as there may be occasions when it is desirable to enter the building by means of a key from theoutside without throwing off the stop work, my present invention contemplates the construction and arrangement of parts which will permit the key to be turned in a direction to retract the latch without throwing off the stop work, the throwing off Specification of Letters Patent.

'of the stop work requiring reverse movement of said key. By this means, I am enabled to accomplish with a single pass key so-called, all of the functions that were ac complished by the use of a master key in my former patent, and I furthermore gain the advantage last described of permitting the door to be opened from the outside by means of a key when the stop work is on, without throwing oif said stop work. This arrangement of parts likewise makes-it possible to employ a single cylinder lock roll back of conventional form, instead of the special form preferably employed in a lock-such as set forth in my aforesaid patent, thereby somewhat cheapening the cost of construction. Whereas in the former lock construction, it was only the holder of a master key that could perform allof the aforesaidfuhctions, I now make it possible for the holder of an ordinary key to perform all of these functions; It willfalso be noted that by the arrangement of parts hereinbefore described, all of these movements may be effected by said single key and said-single conventional cylinder roll back without any Figure 1 is a view illustrative of the interior of a lock with the outer side of case removed to show the working parts. In this view the parts are shown associated with a strike plate and the mechanism is set in a positionto prevent the picking back of the latch from the outside, and in this position "also the outside hand operated roll-back is dogged by a so-called stop work device.

Fig. 2 similar view'of certain parts in another position, that is to say the position in which they would appear when the key is "turned to retract the latch.

n Fig. 3 is a similar view of said parts in still another position, the key being here shown as turned backwardly to throw off the stop work and release the outside roll back. V

Fig. 4 is a similar view of said parts when the same are in position to hold the latch retracted so as to leave the door with which "the lock is associated entirely free to be pushed open.

' Fig. 5 is a detailed view of certain parts detached from Fig. 1 and showing 'sald parts in the same position.

Fig. 6 is a detail view of the same parts i 2 1s a spring I and to beheld back thereby whenever the so .that by door is closed, the function of this controller being later described. 6 i a latch retracting lever pivotally mounted at 7 .in the lock case and arranged to be operated by a key, in

this case the key being of the fiat type for operation of acylinder lock 8, the cylinder lock being mounted on the outer side of the lock case in the usual manner. Thiscylindcrlock-carries the conventional roll back 9 at the inner end of the rotatable'keyjplug, rotating the key plug andthe roll back 9 from the position shown in Fig.

. l to the position shown in Fig. 2,'the latch 2 maybe retracted by the key, as shown in: .the last -mcntioned figure. In this -particu-' larflinstance, there. is a swinging lever 10 pivoted at 11in thecase against'which the cylinder rollback 9 strikes, the freeend of the lever 10 bearing against an offset shoulder'on the retracting lever 6, whereby when said key 1s turnedas described, it wlll have the effect of retracting the latch 2. 12 is an ordinary roll back'mounted'in the easel. This roll back is designed to be operated-by an ordinary knob (not shown) in the inner side ofthedoor, and hence we will refer to .thi roll back as the inside roll back. In this instance, the arm. of the roll back 12 engages the end oflever 6 so that when the latch 2 is retracted by the roll back 12'it is effectedthroughthe medium of lever 6. .13 is a cross head or plate at the rear end: of the latch bolt 2 against which the end of lever 6 operates. 1 1" is theiusual' swinging a roll back pivoted'at 15, the other end of said roll back engaginglever 6 so that when the rollback'le is swung back on'the pivot 15, it will in turn retract the latch. This swinging roll back 1+1. is preferably operable by what is known I as a thumb piece (not shown), said thumb piece engaging the unf der side of the roll back 1 1 through a notch 16 in the lower edge of the case, thisfor'm of construction being very well known. -We will refer to the roll back ltasthe outside roll back.

Y "17 is a stop-work lever which is designed to either engage-or free the outside roll back 14;. This lever is pivoted at 18. In Fig. 1

projected through the faceplate the upperendyof the The free end of the; lever 29 is located and 7 -:limit.- Thelower edge the stop work lever 17 is shown as engaging and dogging the outside roll back 14, whereas in Fig. 3, it is shifted back or thrown offto a position where this roll back 14 is free. '19 is a lever pivoted at 20 and having one end 21 adapted when in the'position shown in F ig. 1, to stand back of the projected latch bolt 2 so that the latter cannot be pickedback by a tool inserted between the faceplate 3 and the strike plate 1. "This lever 19 has another arm 22 which is inclined, as shown, so that when a stud 23 on the rear end of-the controller 5 stands'in the position shownin Fig. 1, (wherein the controller 5 is retracted), it will allow the lever 19 to swing down into the latch'dogging position therein shown. When, however, the controller 5 isprojected, as shown. in Figs.

'3 and 4, the stud-23 will engage the arm 22 and liftthe end 21 so as to free the latch -bolt 2. 7 r

R24is a swinging lever pivoted onstud 7 andhaving the two offsets, 2627. At the lower end of the lever isa pin28 which projects into a curved slot 28 in a second lever 29, the latter'being pivoted on'a stud'80 on stop work lever 17.

is slidable under the shoulder-for the pivot Stud 20, so that it i cannot I of the freeend of saidlever 29 rides along the upper edge of the cross head 13. wheneverthe lever 29 is tilt up beyond that given a, sliding movement. At all times eX- cepting when the latch 2 is dogged back as hereinafter described, the pin128 stands in the lower part-of the curved SIOtiI Ithe lever '29, as'shown-in Figs. 1, 2, 3 and-5,

It is'important to note that this cam' slot 28 pitches down toward the faceplate of thelock. That is to say, the-"pitch of this cam slot is in an opposite-direction to the corresponding camf slot shown in the lock of 7 my former patent, c

In, the body of the lever 19'is an opening 31 of a generaltriangularQoutline and into which is 'preferably' flattened or otherwise suitably shaped to workto advantage there- 111; ,Assumingthevarious; parts stand as shownin Fig. 4', this'stud 30 will, by cooperation with the inclined upper edge of the opening 311, lift or'support the free end .121, ofthe' latch dogging lever 19 and hold it lnfthis lifted position even though. the controller-5-bepret-ractedr v [It is important to note that this opening -31'1sa'rranged reversely tothat shown in my former patent, that is to say the'narrower part of said flopening is toward the face plateB. 7

32 isa "shoulder on; the latch retracting edge of the latch dogging lever 19 in such a way that whenever the lever V 6' is retracted,

this opening projects the'end of the stud '30 lever 6 which also cooperates with'the lower.

by any of the roll-backs 9, 12 or 14, the first part of the movement will quickly lift the latch dogging lever 19 so as to remove it from behind the latch before thecontinued rearward movement of the lever 6 retracts the latch.

Operation.

Starting witlrthe parts as shown in 1, which shows the look as it would appear when the door is closed andthe outer roll back 14. is dogged against operation by the stop work lever 17, it is apparent that access from the outside can now be had only by key. By inserting a key into the cylinder lock and turning thecylinder roll back 9 toward the lever 10, the said roll back will depress the lever10, which by reason of'its engagement with the latch retracting lever 6, will swing the lever so as to retract the latch to the position shown in Fig. 2, so that the door may be opened. It will be noted that this act may be accomplished Without disturbing the stop work, hence, anyone who gains entry in this manner may thereafter close the door with the knowledge. that the stop work is still on so as to prohibit entry thereafter, excepting by a key.

If it is desired to throw off the stop work, the same key while standing in the same key-hole may be used to turn the cylinder roll back 9 in a reverse directionfrom that first described, until it assumes the position indicated in Fig. 3. This movement of the key causes the cylinder-roll back 9 to engage the shoulder 27 on the'lever 24., so as to swing the latter in a direction'to move the,

slide 29 toward the face plate3 of the lock. Since the slide 29 is connected to the upper end of the stop work lever 17, it moves the lower end of the latter from the dogging position indicated in Fig. 2, atothe off position indicated in Fig. 3.

In my former patent, it will be recalled that when amaster key is used (which by the way, is the only key which can be employed in that lock to set the stop work) the turning of that key in the direction to retract the latch, also .incidentally releases the stop work. In the present case to avoid the releasing of the stop work by such a movement, I have so 7 constructed the parts that it requires a reverse rotation of the key for that purpose, so that the stop work will never be thrown off unintentionally.

. Assuming it is desired to hold the latch bolt retracted for certain periods, so that the door may be freely pushed open, as is frequently desirable when such locks are employed on the exit doors of schools, stores, or public buildings, the following, steps are taken First, the cylinder roll back 9 is turned so as to throw oil the stop work, causing the parts to stand as shown in Fig. 3. When this retracting lever is swung back occurs, the rear endof the slide 29 will stand sufiiciently far advanced, so that when the latch bolt 2 is pushed back,the cross-head 13 will move to the rear of the rear end of said slide as indicated in dotted lines, thereby permitting the rear end of the slide 29 to be tilted down to the position shown in Figs. 4; and 5, wherein the rear end of said slide will block the advance of the latch. This tilting down of the rear end of the slide 29 is effected by merely turning the key control roll back 9 as far as possible in the first mentioned direction, that is to say, in the direction to engage the lever 10, whereby, through 'the medium of the-latter which engages the shoulder 26 on the lever 24, the pin 28 will be caused to ride along the lower edge of the cam slot 28, so as to force the rear end of the slide lever 29 downwardly into the latch vanced to the position wherein the stop work lever is thrown 0H,. because at all other times the rear end of the slide lever 29 will stand over the cross-hea,d{13,even when the latter is fully repressed, as shown in Fig. 2.

"It should be noted that whenever the latch the first part of. this movement'causesthe shoulder 82 on said retracting lever to engage the bevel 'on the latch dog lever 19, so as to lift the latter out of the way of the latch bolt, whereby a continued rearward movement of the retracting lever 6 may retract the latch. It should also be noted'that whenever the stop work 17 is ofi', the latch dogging lever 19' is also off, the latter being lifted by the pinBO acting on the beveled up oer wall of the opening 31 (see Fig.3). t all such. times, it is, of course, unnecessary to dog the latclragaiust being picked back, because at such times the latch may be retracted by merely operating the outer roll back I l which is thenfree.

It will be understood of course, that the .cylinder'lock is mounted in the side plate of the lock case which has been removed from the" several-figures of the drawings. In

the claims, for" convenience of expression, I may refer to the roll-back 9 as the key roll-back, or cylinder lock roll-back, this device in reality constituting in effect the inner end of the key itself when the latter is in place in the cylinder lock and therefore operating the same as would the bitted end of an ordinary key. I mention this because it is perfectly obvious that under certain conditions it might be possible to use an ordinary key for operating the internal parts instead of perfecting saidoperation through the medium and with the assistance of a pin cylinder look. I have not attempted to describe the various springs employed to im- V 1 in combination witha so-called c 'linder- 'part movement to the various internal pieces.

In the main, all of said springs are shown and their-operation is obvious. It will be understood, that by the construction herein described, anyone holding a key which will operate roll-back 9 may, with an understanding of the lock, use that same key to perform all of the various functions herein described thereby obviating the necessity of another special key for that purpose and without transferring the said key to any other cylinder lock or key passage.

to which the lock is applied, a latch retract,-

ing lever within said case, and operable by a keyinserted from the outside in a key passage and turned in one dlrectlon, a stop work device for dogging said roll back,

said stop work device being movable to the on position'by the said key standingin the same key passage and turned inthe aforesaid direction, and being moved to the ofi position by a reverse turning movement of said key insaid passage. 7

'2. A structure such as speclfied in claim lock in which said key passage is ormed,

said cylinder lockincluding a rotatable plu ,with a roll back arm at the innerend thereo 3. A structure such as specified in claim 1 in combination with a latch hold back de- "vice'to hold said latch in its retracted position, said hold back device being operatively associated with said stop work mechanism, and being operable for holding backthe' latch only when the said stop work mechanism is off, and only when said key is m tated. in a direction reverseto .thatrequired for retracting the latch: I

4;. A structure such as specified in claim 3 in combination with a latch dogging device for holding the latch projected when the door is closed andtlie stop work is on, with means associated with the latch retracting mechanism to throw oil said dogging device I when the latch isretracted by said key.

5. A structure such'as sp'ecifiedin claim 41in combination with a connection between said stop work and said dogging device,-

7 t 77 whereby when sa1d stop work is oflf sa1d retracting said latch, a stop work device for engaging said roll back to prevent the operation thereof at certain times, a key actuated latch retracting lever separate from said stop work but operable simultaneously therewith by a single key when the latter is turnedin one direction, whereby said latch may be retracted, and said stop work thrown to the on position by the saidmovement of said key, said stop work being thrown 05 by a reverse rotation of said key.

7. A structure suchas specified inclaim 6 in combination with a latch hold back de vice independent of said latch retracting lever but associated. with said stop work, and-operable only vwhen said stop work is off and after said latch has been repressed,

said hold back device at s'uch a time being operable by turning said key: in the aforesaid'latch retracting direction. V

single roll back arm for 'cooperation' with' the internal parts of said lock, means 'operable by said cylinder "roll back to retract said retracting meansfor holding said latch in its retracted position by' the operation of the same'cylinder roll-back, aroll'b ack'for manually retracting said latch from 'the outer side cram door, a stop work for said roll back, separate-from said latch retractlatch, and arranged to be'thrown to the off position by said cylinder roll back when the latter isturned'in the opposite idirectionL-f i :NoR AN nuns;

"the'latch bolt, and means independent of mg means,iand operable by the same cylin- "der roll back, to-be thrown totheion positionb ya turning movement of the key in the cylinder lock in'a direction to retractlthe 

